There are a total of 50 unlockable achievements in Alien Isolation on the Xbox One, with 44 of them being standard achievements, and six of them being secret achievements.
Regular Achievements in Alien Isolation
A Hunt Begins (10 points) – Completed “Encounters”
A Perfect Organism (10 points) – Encountered the Alien in Sevastopol for the first time
A Record of Disaster (10 points) – Collected an archive log
A Synthetic Solution (10 points) – Completed “A Synthetic Solution”
A True Engineer (20 points) – Constructed one of each craftable item
An Outpost of Progress (10 points) – Completed “Seegson Synthetics”
Archivist (40 points) – Collected all Nostromo logs
Awake (10 points) – Completed “Closing the Book”
Bait (10 points) – Completed “The Trap”
Build to Survive (5 points) – Constructed an item
Caught in the Trap (10 points) – Completed “The Outbreak”
Consultation (10 points) – Completed “Consultation”
End of the Hunt (10 points) – Completed “Tomorrow, Together”
Every Bullet Counts (10 points) – Used the revolver
Fault Detected (20 points) – Killed an Android
Free the Torrens (10 points) – Completed “Desolation”
Hazard Containment (10 points) – Completed “Hazard Containment”
Hide. Run. Survive. (40 points) – Completed “The Quarantine” without being killed by the Alien
How Do You Feel? (10 points) – Completed “The Quarantine”
I Admire its Purity (20 points) – Detected 30 targets with the motion tracker
Just out of Reach (40 points) – Contacted your team and escaped Comms without being attacked by an android
Light ’em Up (10 points) – Used the flamethrower
Mercy or Prudence? (50 points) – Completed the game without killing any humans
My Turn Now (40 points) – Killed an android using only the maintenance jack
Not a Scratch (20 points) – Escaped from android combat without taking damage
One Shot (100 points) – Completed the game without dying
Power Games (10 points) – Accessed 10 different rewire points
Ripley, Signing Off (50 points) – Completed the game on any difficulty setting
Seegson Security Bypass (10 points) – Performed 10 successful hacks
Seegson Systems Expert (10 points) – Completed 10 minigames successfully
Self Defense (10 points) – Killed 10 humans
She’s in the Vents… (20 points) – Used the vent system 20 times
Shock to the System (10 points) – Used the stun baton
Survivor (100 points) – Completed the game on the hardest difficulty setting
The Message (10 points) – Completed “The Message”
The Missing (10 points) – Collected an ID tag
The Taken (40 points) – Collected all ID tags
This Should Work (10 points) – Used the bolt gun
Throwing the Switch (10 points) – Completed “The Descent”
Transmission (10 points) – Completed “Transmission”
Use With Caution… (10 points) – Used the shotgun
Voices of Sevastopol (40 points) – Collected 100 archive logs
Welcome to Sevastopol (10 points) – Completed “Welcome to Sevastopol”
You Shouldn’t Be There. (10 points) – Completed “Seegson Communications”
Secret Achievements in Alien Isolation
100 Times Too Many (5 points) – Killed by the Alien 100 times
Back Off (10 points) – Caused the Alien to retreat by using the flamethrower
Mind Your Step (20 points) – Navigated Reactor Maintenance without dying
Not the First (10 points) – Turned off the beacon
Retreat From Fire (20 points) – Caused the Alien to retreat using a molotov
Stunned (10 points) – Knocked down a human or stunned an android with a non-lethal attack
